<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/login" method="post">
    用户名:<input type="text" id="username" name="username"><br>
    密码:<input type="password" id="password" name="password"><br>
    <button type="submit">提交</button>
</form>
</body>
</html>